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Finding the Fourth Proportional to 172,691.40, 258,518.70 and 102,534.60

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Solution

The fourth proportional to 172,691.40, 258,518.70 and 102,534.60 is: 153,494.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,691.40 : 258,518.70 = 102,534.60 : x
  2. Step 2: Convert to fraction form
    172,691.40/258,518.70 = 102,534.60/x
  3. Step 3: Cross multiply
    172,691.40x = 258,518.70 × 102,534.60
  4. Step 4: Simplify right side
    172,691.40x = 26,507,111,497.02
  5. Step 5: Solve for x
    x = 26,507,111,497.02/172,691.40
  6. Step 6: Final answer
    x = 153,494.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.